A traveler walking along the eastern bank of Hudson Bay in northern Quebec can stand on the oldest bedrock known on Earth. This ancient section of the planet's crust may be as much as 4.28 billion years old, researchers report in Friday's edition of the journal Science.

A traveler walking along the eastern bank of Hudson Bay in northern Quebec can stand on the oldest bedrock known on Earth. This ancient section of the planet's crust may be as much as 4.28 billion years old, researchers report in Friday's edition of the journal Science.

A traveler walking along the eastern bank of Hudson Bay in northern Quebec can stand on the oldest bedrock known on Earth. This ancient section of the planet's crust may be as much as 4.28 billion years old.

North American Indians assembled in the shadow of ancient Mayan pyramids Monday discussed how their tradition wisdom could help save the planet, and were told that even indigenous cultures have struggled with environmental abuse.